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Method for evaluating penetrating quality of fog sealing binder

A technology of permeability performance and evaluation method, which is applied in the field of permeability performance evaluation of fog-sealed cementitious materials. It can solve the problems that the penetration interface is not on the same level, affects the accuracy of penetration test results, and cannot continue to infiltrate, so as to achieve uniform bulk density. , Eliminate air resistance and improve accuracy

Inactive Publication Date: 2019-03-15
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is likely to lead to the phenomenon of "air lock" during the experiment (referring to the situation that the emulsified asphalt cannot continue to infiltrate before the infiltration is completed, that is, after a certain infiltration time, the highest level of emulsified asphalt is not the same as the highest level of fine sand. overlapping phenomena, such as figure 1 Shown in (A)) and the penetration interface of the permeable layer material is not uniform (fluid mechanics stipulates that when the emulsion seeps vertically in a homogeneous medium, the emulsion seepage velocity is consistent, and the penetration depth of the emulsion in the vertical direction should be on the same level; In the quantitative penetration test, the surface forming the lowest point of emulsified asphalt after infiltration is called the permeation interface. Under ideal conditions, the permeation interface is a horizontal plane, but due to factors such as test equipment and manual operation, the permeation interface is not on the same horizontal plane. This phenomenon is called inhomogeneous penetration interface, such as figure 1 As shown in (B)), which affects the accuracy of the penetration test results

Method used

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  • Method for evaluating penetrating quality of fog sealing binder
  • Method for evaluating penetrating quality of fog sealing binder
  • Method for evaluating penetrating quality of fog sealing binder

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Experimental program
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Embodiment 1

[0068] according to figure 1 Assemble the permeation device, wherein, the specifications of the hollow glass tube, screen cloth and glass funnel in the permeation device are as shown in Table 1:

[0069] Table 1 Specifications of hollow glass tubes, screens and glass funnels

[0070]

[0071] Using the permeation device to carry out the permeation performance evaluation experiment of the material to be tested may include the following steps:

[0072] (1) Pour 60.0 g of standard sand with a particle size of 0.15 to 0.3 mm into the hollow glass tube through a glass funnel, record the sand pouring time, and use the sand pouring time as an independent variable to loosely pack the standard sand in the hollow glass tube. Density is the linear curve of the dependent variable and the sand pouring time, and the bulk density ρ of the standard sand in the hollow glass tube is calculated;

[0073] (2) Pour 6.0g of the material to be tested into the hollow glass tube equipped with sta...

Embodiment 2

[0090] In order to further study the influence of experimental conditions on the test results and the possibility of producing errors, the present invention has carried out the following tests:

[0091] 1) Influence of sand pouring method on the uniformity of bulk density of standard sand:

[0092] Use a glass funnel to pour the standard sand into the hollow glass tube. Compared with the direct sand pouring method, the bulk density of the standard sand is more uniform (such as image 3 (A) is the glass funnel sand pouring method, (B) is the direct sand pouring method), to ensure a more uniform penetration interface of the subsequent fog-sealed cement, and to improve the accuracy of the penetration test results.

[0093]2) Influence of sand pouring speed and standard sand particle size on the loose density uniformity of standard sand:

[0094] Under the conditions of different sand pouring speeds and standard sand particle sizes, the standard sand was poured into the hollow gl...

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Abstract

The invention provides a method for evaluating penetrating quality of a fog sealing binder. With the adoption of a funnel-type sand pouring method, uniform apparent density of standard sand in a hollow glass tube is ensured, a uniform penetrating interface of the subsequent fog sealing binder is ensured, the 'air resistance' phenomenon in the penetrating test process is eliminated by utilizing a screen, and the result accuracy of the penetration test is improved. The invention provides a complete test method. According to a penetration speed formula provided by the invention, the penetrating quality of the fog sealing binder can be quantitatively analyzed. Furthermore, the invention provides specifications of a hollow glass tube in a penetration unit, a glass funnel and a screen as well astest conditions. The test error can be eliminated at the utmost, and the result accuracy of the penetration test is improved.

Description

technical field [0001] The invention relates to the technical field of permeability performance evaluation, in particular to a method for evaluating the permeability of fog-sealed cementitious materials. Background technique [0002] As a preventive maintenance method, the fog seal layer is to spray the fog seal cement, that is, diluted liquid asphalt (including emulsified asphalt, modified emulsified asphalt, etc.) , bonding loose asphalt and aggregates, improving the appearance of the pavement, restoring the color of the pavement, etc. Fog-sealed cement is a kind of permeable material, and the evaluation of its permeability is of great significance for guiding road maintenance construction. [0003] At present, the permeability evaluation methods of permeable materials at home and abroad are mainly divided into two categories: [0004] (1) Simulated base-level specimen method [0005] The simulated base-level specimen method uses Marshall test mold or rutting plate test...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/08
Inventor 蒋应军段建先谷国庆纪小平高香龙李权威杨晨光雷甲张毅
Owner CHANGAN UNIV
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